Huskerfan22 said:
"
I was wondering if anyone could tell me when this shotgun was manfactured. The serial number on it is 377573."
Remington used a letter code system for dating their guns. The lettering on the barrel (as long as the serial matches the receiver) should date the month and year of your gun.
Here is a website where you can enter your code to see what that date is.
http://armscollectors.com/sn/remdates.php